Sevim Hamzaçebi 1

1 İzmir Katip Çelebi University, Faculty of Fisheries, Department of Aquaculture, İzmir, Turkey
DOI :
10.4194/1303-2712-v19_4_04
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In this study, the embryonic development of pink dentex (Dentex gibbosus Rafinesque,
1810) eggs were investigated in detail by using groundwater in aquacultural conditions.
Groundwater at 35‰ salinity and 19.5°C temperature was used during the experiment. The
eggs were obtained by applying hormone to the D. gibbosus broodstocks which were caught
in nature and grown in a hatchery. The average diameters of the eggs and oil globule were
0.7252±0.020 mm and 0.1517±0.015 mm respectively. In order to investgate the embryonic
developmental stages of the eggs, photographs were taken in every 15 minutes until the
stage of the morula, and then, at hourly intervals. Following the fertilization of the eggs, the
morula stage, the gastrula stage, the neurula stage, the somit formation and the kupffer
vesicle formation were occured at 3.42th, 8.30th, 14.21th, 18.13th hours, respectively.
Hatching occured after 39.41 hours from fertilization. Hatching rates were determined as
86%, 8 %, and 89% at 19.5±0.3 °C. The length of the newly hatched prelarvae were measured
around 2.52±0.045 mm.
Keywords :
Pink dentex, Embryogenesis, Hatching ratio, Egg diameter